SW1210802_O&M Agreement/Plan_20231107

BOOK 4021 PAGE 592 (7)
1000994710
This document presented and filed:
03/13/2023 09:23:29 AM
WILLIAM LEE KING, Henderson COUNTY, NC
0 p I IGllh414ACZ
erg 1)
45 ( (( /Vlt�
in() cA
G1 Df,R
7,2 (7S VI?) L z 1n/
�l {r)�� 11 , ,4/� ` ( e739'

Book 4021
Page 593
Operation & Maintenance Agreement
Project Name: Pardee Partners - ASC
Project Location: Town of Mills River, Henderson County, North Carolina
Cover Page
Maintenance records shall be kept on the following SCM(s). This maintenance record shall be kept in a log in a known set location.
Any deficient SCM elements noted in the inspection will be corrected, repaired, or replaced immediately. These deficiencies can
affect the integrity of structures,safety of the public, and the pollutant removal efficiency of the SCM(s).
The SCM(s)on this project include (check all that apply&corresponding O&M sheets will be added automatically):
Infiltration Basin Quantity: Location(s):
Infiltration Trench Quantity: Location(s):
Bioretention Cell Quantity: 1 Location(s): Along Southern Property Boundary
Wet Pond Quantity: Location(s):
Stormwater Wetland Quantity: Location(s):
Permeable Pavement Quantity: Location(s):
Sand Filter Quantity: Location(s):
Rainwater Harvesting Quantity: Location(s):
Green Roof Quantity: Location(s):
Level Spreader- Filter Strip Quantity: Location(s):
Proprietary System Quantity: Location(s):
Treatment Swale Quantity: Location(s):
Dry Pond Quantity: Location(s):
Disconnected Impervious Surface Present: No Location(s):
User Defined SCM Present: No Location(s):
Low Density Present: No Type:
CLICK TO UPDATE O&M MANUAL
I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for
each SCM above, and attached O&M tables. I agree to notify NCDEQ of any problems with the system or prior to any changes to the
system or responsible party.
Responsible Party: WNC Specialties, LLC
Title&Organization: Johnna Reed -Chief Administrative Officer .
Street address: 800 N Justice Street
City, state,zip: Hendersonville, NC 28792 ,
Phone number(s):
Email: johnna,[e-mail]
Signature: /�� 4 Date: 3-9-2023
I, 3/tplul•-% a '� , a Notary Public for the State of /4pr-�1 ( O
County of /44r1A .fS� 1 , do hereby certify that r30hnna f�,tic-S
personally appeared before me this co) day of itlQ(ti*/k ,9_03 and
acknowledge the due execution of the Operations and Maintenancentn Agreement.
Witness my hand and official seal, 1 (.�/� .
�`.�0 wAL+#$
,�? I p�FIY
s CO G
��_�'
Seay��'410,4.RSON� ` My commission expires S I')���(�h
STORM-EZ 1/20/2023
Version 1.5 O&M Agreement Page 1 of 5

Book 4021
Page 594
Bioretention Maintenance Requirements
Important operation and maintenance procedures:
Immediately after the bioretention cell is established, the plants will be watered twice weekly if needed
- until the plants become established (commonly six weeks).
- Snow, mulch or any other material will NEVER be piled on the surface of the bioretention cell.
- Heavy equipment will NEVER be driven over the bioretention cell.
- Special care will be taken to prevent sediment from entering the bioretention cell.
- Once a year, a soil test of the soil media will be conducted.
Remove top layer of fill media when the pool does not drain quickly. Based on the media specification,
- the pool should drain within 24 hours.
After the bioretention cell is established, it will be inspected quarterly and within 24 hours after every storm event
greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance shall be kept in a
known set location and shall be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately.
SCM element: Potential problem: How to remediate the problem:
The entire bioretention Trash/debris is present. Remove the trash/debris.
cell
The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to remove the gully, plant ground
bioretention cell erosive gullies have cover and water until it is established. Provide lime and a one-
formed. time fertilizer application.
The structure is clogged. Unclog the structure and dispose of any sediment off-site.
The flow diversion
structure (if applicable) The structure is damaged. Make any necessary repairs or replace if the damage is too much
for repair.
The inlet pipe is clogged (if Unclog the pipe and dispose of any sediment in a location where
applicable). it will not cause impacts to streams or the SCM.
The inlet pipe is cracked or
otherwise damaged (if Repair or replace the pipe.
applicable).
The inlet device Regrade the swale if necessary and provide erosion control
Erosion is occurring in the devices such as reinforced turf matting or riprap to avoid future
swale (if applicable). erosion problems.
Stone verge is clogged or Remove sediment and clogged stone and replace with clean
covered in sediment (if
applicable). stone.
Flow is bypassing Regrade if necessary to route all flow to the pretreatment area.
pretreatment area and/or Restabilize the area after grading.
gullies have formed.
Sediment has accumulated Search for the source of the sediment and remedy the problem if
to a depth greater than possible. Remove the sediment and dispose of it in a location
The pretreatment area three inches. where it will not cause impacts to streams or the SCM.
Erosion has occurred. Provide additional erosion protection such as reinforced turf
matting or riprap if needed to prevent future erosion problems.

Book 4021
Page 595
Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe
it on the plants rather than spraying.

Book 4021
Page 596
Bioretention Maintenance Requirements (continued)
SCM element: Potential problem: How to remediate the problem:
Best professional practices
show that pruning is Prune according to best professional practices. Maintain lines of
needed to maintain optimal sight between 2'-6'.
plant health.
Determine the source of the problem: soils, hydrology, disease,
etc. Remedy the problem and replace plants. Provide a one-time
Bioretention cell Plants are dead, diseased fertilizer application to establish the ground cover if a soil test
vegetation or dying. indicates it is necessary. If sod was used, check to see that it
was not grown on clay or impermeable soils. Replace sod if
necessary.
Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe
it on the plants rather than spraying.
Tree stakes/wires are
present six months after Remove tree stake/wires (which can kill the tree if not removed).
planting.
Spot mulch if there are only random void areas. Replace whole
Mulch is breaking down or mulch layer if necessary. Remove the remaining mulch and
has floated away. replace with triple shredded hard wood mulch at a maximum
depth of four inches.
Determine the extent of the clogging - remove and replace either
Soils and/or mulch are just the top layers or the entire media as needed. Dispose of the
Bioretention cell mulch spoil in an appropriate off-site location. Use triple shredded hard
and media clogged with sediment. wood mulch at a maximum depth of four inches. Search for the
source of the sediment and remedy the problem if possible.
An annual soil test shows
that pH has dropped or Dolomitic lime shall be applied as recommended per the soil test
heavy metals have and toxic soils shall be removed, disposed of properly and
accumulated in the soil replaced with new planting media.
media.
Clogging has occurred. Wash out the underdrain system.
The underdrain,filter Clean out the drop inlet. Dispose of the sediment in a location
fabric element, and outlet Clogging has occurred. where it will not cause impacts to streams or the SCM..
system
The drop inlet is damaged Repair or replace the drop inlet.
Erosion or other signs of
damage have occurred at Repair the damage and improve the flow dissipation structure.
the outlet.
The receiving water Discharges from the
bioretention cell are
causing erosion or Contact the local NCDEQ Regional Office.
sedimentation in the
receiving water.

NC Division of Energy, Mineral, and Land Resources Book 4021
Operation & Maintenance Inspection Form — Bioretention Cell Page 597
Project name:Pardee Mills River ASC Permit number: Inspection date:
S W 1210802
Street address:3831 Boylston Highway City:Mills River State and ZIP code:NC,28759
Name of inspector: Phone number: Email address:
Description of SCM location on the project:
Signature of Inspector certifying that the information provided in this form is complete and correct:
Stormwater Collection System,Accessibility,and Overall Cell
1. Swales are free from blockage and erosion. Yes ❑ No ❑ N/A ❑
2. Grates, gutters, curb openings, and pipes appear free from damage &clogs. Yes ❑ No ❑ N/A❑
3. Bioretention cell is accessible for inspection. Yes ❑ No ❑ N/A❑
4. Bioretention cell is free from trash and debris. Yes ❑ No ❑ N/A ❑
Inlet(s)and Pretreatment
5. Inlet(s) are free from damage, clogs, and erosion. Yes ❑ No ❑ N/A ❑
6. Flow is directed to a pretreatment area (if applicable). Yes ❑ No ❑ N/A ❑
7. Pretreatment area is free from erosion and clogging (if applicable). Yes ❑ No ❑ N/A ❑
8. Pretreatment area has< 2 inches of accumulated sediment (if applicable). Yes ❑ No ❑ N/A ❑
Bioretention Cell if Vegetation is Grass
9. Grass is healthy. Yes ❑ No ❑ N/A ❑
10. Grass is not fertilized. Yes ❑ No ❑ N/A ❑
11. Base of grass is at least 10 inches below the outlet structure. Yes ❑ No ❑ N/A ❑
Bioretention Cell if Vegetation is Trees&Shrubs
12. A two-to-four-inch layer of mulch is present. Yes ❑ No ❑ N/A ❑x
13. Mulch is not clogged with sediment. Yes ❑ No ❑ N/A
14. Cell is free of weeds and obligate wetland vegetation. Yes ❑ No ❑ N/A El
15. Vegetation is healthy and not overgrown, especially if safety is an issue. Yes ❑ No ❑ N/A
16. Tree stakes/wires are not present (remove after 6 months). Yes ❑ No ❑ N/A 0
17. Vegetation is not fertilized. Yes ❑ No ❑ N/A El
18. Top of the mulch is at least 10 inches below the outlet structure. Yes ❑ No ❑ N/A NI
Underdrain and Outlet
19. Standing water is not present in the bioretention cell. Yes ❑ No ❑ N/A ❑
20. Underdrains appear free from damage and clogs. Yes ❑ No ❑ N/A ❑
21. Clean out/observation pipes are not damaged. Yes ❑ No ❑ N/A ❑
22. Emergency bypass and/or bypass swale is clearly visible & in good condition. Yes ❑ No ❑ N/A ❑
23. Outlet structure is free from damage, clogs, and erosion. Yes ❑ No ❑ N/A❑
Version 1.0—April 2021

Book 4021
Page 598
Action Plan to address any"Nos" listed above, including dates for completion (for permittee to complete):